A long cylindrical shell carries positive surface charge `sigma` in the upper half and negative surface charge `-sigma` in the lower half. The electric field lines around the cylinder will look like figure given in:(figures are schematic and not drawn to scale)

Options

A.
B.
C.
D.

Answer

A

Explanation

As lower an upper half carry equal and opposite charges, hence electric field around the cyclinder will be identical to that of an electric dipole.
Choice (a) is correct.